1994155955 has 8 divisors (see below), whose sum is σ = 2610531504. Its totient is φ = 1450295200.

The previous prime is 1994155931. The next prime is 1994155957. The reversal of 1994155955 is 5595514991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1994155955 - 2⁸ = 1994155699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1994155897 and 1994155906.

It is not an unprimeable number, because it can be changed into a prime (1994155957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18128636 + ... + 18128745.

It is an arithmetic number, because the mean of its divisors is an integer number (326316438).

Almost surely, 2^1994155955 is an apocalyptic number.

1994155955 is a deficient number, since it is larger than the sum of its proper divisors (616375549).

1994155955 is a wasteful number, since it uses less digits than its factorization.

1994155955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36257397.

The product of its digits is 1822500, while the sum is 53.

The square root of 1994155955 is about 44655.9733406406. The cubic root of 1994155955 is about 1258.6926801235.

The spelling of 1994155955 in words is "one billion, nine hundred ninety-four million, one hundred fifty-five thousand, nine hundred fifty-five".